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Publication numberUS4375862 A
Publication typeGrant
Application numberUS 06/330,142
Publication dateMar 8, 1983
Filing dateDec 14, 1981
Priority dateDec 14, 1981
Fee statusLapsed
Also published asCA1161794A1, DE3220346A1
Publication number06330142, 330142, US 4375862 A, US 4375862A, US-A-4375862, US4375862 A, US4375862A
InventorsRoger A. Kurinsky, Fred D. Alexander, Michael E. Holzkopf
Original AssigneeEkco Products, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Container with dome cover
US 4375862 A
Abstract
The combination of a circular container and cover having their rim and flange, respectively, formed to provide multiple, equally spaced locking means. The container and cover have a plurality of spaced notches and handles, respectively, formed on their outer side walls, said notches and handles providing means for handling and manipulating the container and cover for relative rotational movement therebetween to effectuate said locking means.
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Claims(4)
What is claimed is:
1. The combination of a circular container and a cover therefor having locking means for locking the cover to the container through rotational movement of the cover relative to the container, said container comprising a bottom wall having a side wall extending upwardly therefrom terminating in an outwardly extending rim, said cover comprising a top wall having a side wall depending therefrom terminating in an outwardly and downwardly extending flange adapted to seat on said container rim, holding means formed on the outer surface of the container side wall for gripping said container, and handle means formed on the outer surface of the cover side wall for grasping said cover.
2. A container and cover according to claim 1 wherein the locking means comprises multiple equally-spaced lugs formed on the cover flange extending inwardly therefrom, and the same number of multiple equally-spaced flats formed on the periphery of the container rim, whereby radial alignment of said lugs and flats permits axial movement of the cover relative to the container.
3. A container and cover according to claim 2 wherein the cover handle means comprises multiple equally-spaced protuberances radially aligned with the cover lugs, each lug constituting the lowermost terminus of the associated protuberance.
4. A container and cover according to claim 3 wherein the container holding means comprises multiple equally-spaced notches radially aligned with the container rim flats.
Description
BACKGROUND OF THE INVENTION

This invention relates to disposable containers having covers and particularly to such a container wherein the cover is releasably interlocked with the container by a bayonet closure, or similar closure means requiring rotational movement of the cover relative to the container.

In the use of covered containers to package, distribute and display food items it is desirable that the cover be of a transparent material to permit visual inspection of the packaged food. Therefore, and since the economies of disposable or non-reusable packaging demands a lightweight material for the cover, the cover normally is a see-through plastic of delicate and fragile construction. Such lightweight material does not offer the rigidity necessary for the use of standard closure means, such as crimping, and accordingly, securement of the cover to the container has been by heat sealing, sealing tape or stapling, depending on the composition of the container, or by forming the cover to provide a depending flange or portions of a flange to "snap-over" the rim of the underlying container. The sealing type closures are relatively expensive and the "snap" type closures result in loose or otherwise ineffective closures.

An inexpensive, positive closure, such as the bayonet type, that can be effective by interlocking the cover and container through rotational movement of one relative to the other is highly desirable. However, such a closure is difficult to achieve since the fragile nature of the lightweight plastic cover does not lend itself to the physical handling and manipulation for the required rotational movement. Furthermore, the problem is compounded when the cover is formed as a deep dome, such as to accommodate a two or three layer cake, which provides an unwidely configuration.

Accordingly, it is the primary object of this invention to overcome these disadvantages and provide a bayonet closure for locking a cover on a container, wherein the cover is formed of a fragile material.

SUMMARY OF THE INVENTION

The container, positioned upon upwardly, is circular having an outwardly extending rim with multiple, equally spaced flattened portions formed on the periphery of the rim. A domed cover, positioned open downwardly, is also circular having an outwardly and downwardly extending flange portion designed to overlie the container rim when the cover is placed on the container. The cover flange has multiple, equally spaced, inwardly extending lugs corresponding in number and shape with the container rim flattened portions, and which when aligned therewith permit axial movement of the cover onto the container whereby said lugs are disposed slightly below the container rim, whereupon rotational movement of the cover relative to the container will move the cover lugs under the container rim, to frictional engagement therewith. When the cover lugs are disposed under the container rim the cover cannot be moved axially away from the container.

To permit the holding of, and manipulation of, the container, the outer surface thereof is formed with a plurality of spaced indentations; and, to permit the holding of, and manipulation of, the cover, the outer surface thereof is formed with a plurality of spaced protuberances. The container indentations and the cover protuberances offer means whereby the container and cover can each by grasped by an individual's fingers and thumbs or by mechanical devices.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a container and cover embodying the features of the invention set forth herein.

FIG. 2 is a sectional view taken along lines 2--2 of FIG. 1 but having the cover disposed on the container.

FIG. 2a is a bottom elevational view taken along lines 2a--2a of FIG. 2.

FIG. 3 is a view similar to FIG. 2 but showing the cover after rotation to dispose the cover lugs under the container rim.

FIG. 3a is a bottom elevational view taken along lines 3a--3a of FIG. 3.

FIG. 4 is a perspective view of a container and cover in position for relative rotational movement one to the other for locking the cover to the container, and illustrating the positionment of an individual's thumbs and fingers to effect such relative rotational movement.

FIG. 5 is a perspective view of a container and cover of my invention shown in association with a support device for the container.

DESCRIPTION OF A PREFERRED EMBODIMENT

Referring now to the drawings and specifically FIG. 1, the reference numeral 10 indicates a circular-shaped container comprising a bottom wall 11 having a side wall 12 extending upwardly therefrom and terminating in an outwardly extending rim 14. The rim 14 has multiple, equally spaced flattened portions 15 formed on the periphery thereof. The side wall 12 is formed to provide multiple, equally spaced indentations or notches 16 located in radial alignment with the flattened portions 15 of rim 14.

The reference numeral 20 indicates a circular-shaped cover comprising a top wall 21 having a side wall 22 depending downwardly therefrom and terminating in an outwardly and downwardly extending flange member indicated generally by the reference numeral 24. The flange 24 is formed to provide multiple, equally spaced shoulder portions or lugs 25 extending inwardly therefrom. The side wall 22 is formed to provide multiple, equally spaced protuberances or handles 26 located in radial alignment with the lugs 25 of flange 24.

As shown in FIG. 2 the flange 24 comprises an outwardly extending ledge 27 and a downwardly extending leg 28 terminating in an outwardly extending lip 29. At selected positions on the flange 24 are the previously described lugs 25 formed at the lower part of leg 28 and aligned radially therewith are the associated handles 26, said handles being formed from the side wall material bulged outwardly in a manner to provide flattened spaced-apart portions 31.

Referring to FIG. 1 it can been seen that alignment of cover lugs 25 with container flattened portions or rim flats 15 permits the cover 20 to be placed on the container 10 whereby the cover flange 24 seats on container rim 14. The disposition of the cover lugs 25 relative to the rim flats 15 can best be seen in FIG. 2a.

When the cover 20 has been disposed upon the container 10 as described in reference to FIGS. 1, 2 and 2a an interlocking closure of the cover and container can be achieved by rotational movement of the cover relative to the container. As shown in FIG. 4, the thumb and finger of an individual's one hand indicated by reference numeral 32 can be inserted in the notches 16 of the container 10, and the thumb and finger of an individual's other hand indicated by reference numeral 33 can grasp one of the handles 26 of the cover 20. Rotation of the cover as indicated by the directional arrow 35 will move the cover lugs 25 to disposition under the rim 14 thereby locking the cover 20 to the container 10. This interaction of elements can be seen by referring to FIGS. 3 and 3a. It is understood that the frictional engagement of cover lug 25 and container rim 14 is achieved at five spaced locations in the embodiment shown, but that the actual number of lugs may vary depending on such factors as the circumferential size of the cover 10 or the circumferential span of the lugs 25.

Referring now to FIG. 5 there is shown a support device 40 comprising a ring-like member 41 having multiple, equally spaced posts 42 extending upwardly therefrom. The posts 42 are of a shape and size to fit the notches 16 of container 10 thereby holding the container from rotational movement. Holding the container 10 stationary permits the use of both hands to handle and manipulate the cover 20. The size of some covers and their fragile nature makes such a holding device most helpful in achieving a quick as well as easy locking operation. It should be noted that while the directional arrow 35 of FIG. 4 indicates rotational movement of the cover 20 in a counter clockwise direction to achieve locking as described, that is merely the preferred rotational movement for the shown position of the hands 32 and 33. In fact, the cover 20 can be rotated either clockwise or counter clockwise to achieve locking by moving the cover lugs 25 from a position of alignment with the rim flats 15 to disposition under the adjacent portion of container rim 14. Such optional rotation is attainable when both hands are free to rotate the cover 20, as shown in FIG. 5. It should be clear that after a locked condition has been achieved, unlocking may be effectuated by rotational movement of the cover 20 relative to the container 10 to dispose the lugs 25 in alignment with the rim flats 15.

It is believed that the invention and many of its attendant advantages can be understood from the foregoing description and it will be apparent that various changes may be made in the form, construction and arrangement of parts without departing from the spirit and scope of the invention, the form hereinabove described being merely a preferred embodiment.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2637617 *Jan 3, 1950May 5, 1953Transparent Specialties CorpReceptacle for bakery products
US4197940 *Apr 16, 1979Apr 15, 1980Sunrich Mercantile Corp.Circular cake tray and cover
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4535889 *Feb 8, 1984Aug 20, 1985The Stouffer CorporationFrozen food package and cover lid
US4687117 *Aug 18, 1986Aug 18, 1987The Stouffer CorporationFrozen food package and cover lid
US4712263 *Dec 24, 1986Dec 15, 1987Catherine PronzinskiNeonatal blanket
US4741452 *May 2, 1985May 3, 1988Ekco Products, Inc.Domed container with interlocking resilient flanges
US4742934 *Jul 1, 1986May 10, 1988Packaging Corporation Of AmericaContainer structure
US4776459 *Dec 31, 1986Oct 11, 1988Package Products, Inc.Bakery foods package
US4867303 *May 17, 1988Sep 19, 1989Package Products, Inc.Bakery foods package
US4874083 *Mar 1, 1988Oct 17, 1989Packaging Corporation Of AmericaServing tray and cover therefor
US4884966 *Aug 10, 1988Dec 5, 1989Ethel WexlerProtective cake cover and candle holder
US4947993 *Jul 31, 1989Aug 14, 1990Kathryn NicolosiContainer
US5096274 *Jun 15, 1990Mar 17, 1992Antonio FuschettoCandle bearing ceremonious cake shield
US5176284 *Nov 8, 1990Jan 5, 1993PrimtecReduction of flexure in a plastic container having a thin flexible side wall
US5287959 *May 3, 1993Feb 22, 1994Mobil Oil CorporationDomed container for baked goods or the like
US5310076 *Oct 19, 1992May 10, 1994Arrow Electronics, Inc.Snap-on lid for computer chip tray
US5441166 *Mar 15, 1994Aug 15, 1995Reynolds Metals CompanyDome cover for tray or pan
US5524864 *Jun 8, 1994Jun 11, 1996Dubach; Werner F.Check valve made of plastic
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US5860530 *Jun 30, 1997Jan 19, 1999Tenneco Packaging Inc.Container with a corner latch closure
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US6296120Feb 7, 2000Oct 2, 2001Wegman's Food Markets, Inc.Multiple pastry box
US6581795 *Jun 8, 2000Jun 24, 2003Leifheit AgContainer having handles on both top and bottom thereof
US6892883Jun 27, 2003May 17, 2005Wilma J. BrumfieldCake cover assembly
US7922021May 6, 2004Apr 12, 2011Pactiv CorporationClosure for a food container and method for using the same
US8011531Feb 1, 2010Sep 6, 2011Pwp IndustriesEnhanced container system
US8056751Nov 30, 2007Nov 15, 2011Pwp Industries (California Corporation)Fast closing-twist top opening packaging system
US8307982Aug 18, 2003Nov 13, 2012Pwp Industries, Inc.Cake container cover-base connection
US8474620 *May 12, 2011Jul 2, 2013Sillage, LLCContainer display with cover mountings
US8613368Jan 12, 2012Dec 24, 2013Pactiv LLC.Containers with optional venting
US8770431Mar 14, 2013Jul 8, 2014Kfc CorporationSauce tray and lid system for food container
US20120285856 *May 12, 2011Nov 15, 2012Nicole MatherContainer display with cover mountings
USRE32739 *Jan 21, 1987Aug 30, 1988The Stouffer CorporationFrozen food package and cover lid
Classifications
U.S. Classification220/293, 312/284, 220/788, 220/212.5, D07/392.1, D09/452
International ClassificationB65D43/02, B65D43/04, B65D1/26, B65D85/36, B65D41/16, B65D43/10
Cooperative ClassificationB65D2543/00527, B65D2543/00092, B65D43/0212, B65D2543/00731, B65D2543/00296, B65D2543/00351, B65D2543/00805, B65D2543/00685, B65D85/36, B65D2543/00638, B65D2543/00537
European ClassificationB65D43/02S3E
Legal Events
DateCodeEventDescription
May 21, 1991FPExpired due to failure to pay maintenance fee
Effective date: 19910310
Mar 10, 1991LAPSLapse for failure to pay maintenance fees
Oct 9, 1990REMIMaintenance fee reminder mailed
Sep 12, 1986FPAYFee payment
Year of fee payment: 4
Sep 12, 1986SULPSurcharge for late payment
Dec 23, 1982ASAssignment
Owner name: EKCO PRODUCTS INC., 777 WHEELING ROAD, COUNTY OF C
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:KURINSKY, ROGER A.;ALEXANDER, FRED D.;HOLZKOPF, MICHAELE.;REEL/FRAME:004072/0567
Effective date: 19811211